Method for preparing high-entropy ceramic-based composite material by reactive infiltration process

By generating high-entropy carbide ceramic matrices in situ through reactive melting infiltration, the problems of long preparation cycles, high porosity, and high raw material costs of existing high-entropy ceramic matrix composites are solved. This enables rapid densification and performance improvement of high-entropy ceramic matrix composites, making them suitable for thermal protection materials for hypersonic vehicles.

CN122079650APending Publication Date: 2026-05-26NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Application Number
CN202610533789.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-22
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing high-entropy ceramic matrix composite material preparation processes suffer from problems such as long preparation cycles, low ceramic yield, high composite material porosity, high raw material costs, and insufficient introduction of high-entropy ceramic phases, which limit their application in hypersonic vehicle thermal protection materials.

Method used

By employing a reactive melting process, at least four single-component carbides are mixed with a carbon source and then introduced into a continuous fiber preform via vacuum or pressure impregnation. Combined with transition metal or alloy embedding, a high-entropy carbide ceramic matrix is ​​generated in situ, thereby achieving rapid densification of the composite material.

Benefits of technology

It significantly increases the content of high-entropy ceramic matrix, enhances the high-temperature stability, oxidation resistance and ablation resistance of the material, meets the stringent requirements of hypersonic vehicles for ultra-high temperature materials, and is suitable for mass production.

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Abstract

The invention discloses a method for preparing a high-entropy ceramic-based composite material through a reactive infiltration process, and belongs to the technical field of ceramic-based composite materials. The preparation method comprises the following steps: ball-milling at least four single-component carbides, mixing with a carbon source, and dispersing in a dispersion liquid to prepare slurry; weaving continuous fibers into a preform, and depositing an interface layer and a matrix layer to obtain a semi-compact composite material; introducing the slurry by vacuum or pressure impregnation; and after embedding with transition metal and alloy thereof, reacting and infiltrating to generate a high-entropy carbide matrix in situ and densifying. The method solves the problems of long process period, high porosity, high cost, insufficient introduction of high-entropy ceramics and the like in the prior art, realizes rapid densification, improves the high-temperature stability, oxidation resistance and ablation resistance of the material, and is suitable for large-scale production of thermal protection materials of hypersonic aircrafts.
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